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. Author manuscript; available in PMC: 2016 Sep 1.
Published in final edited form as: Am J Gastroenterol. 2015 Aug 25;110(9):1339–1346. doi: 10.1038/ajg.2015.220

Table 2.

Small and large bowel intraluminal pH levels

IBS
(n=47)		 HC
(n=10)		 P - value
Small bowel pH
 Q1 small bowel pH 6.1±0.7 6.2±1.0 0.885
 Q2 small bowel pH 6.7±0.5 6.7±0.4 0.840
 Q3 small bowel pH 7.1±0.4 7.1±0.4 0.994
 Q4 small bowel pH 7.3±0.4 7.3±0.5 0.878
 Total small bowel pH 6.8±0.4 6.8±0.4 0.937
Colonic pH
 Q1 Colonic pH 6.4±0.6 6.8±0.4 0.011
 Q2 Colonic pH 6.8±0.7 7.1±0.5 0.173
 Q3 Colonic pH 7.0±0.8 7.5±0.6 0.081
 Q4 Colonic pH 7.2±0.8 7.8±0.8 0.046
 Total Colonic pH 6.8±0.7 7.3±0.5 0.042

IBS; irritable bowel syndrome, HC; healthy control, Q; quartile

The data are presented as mean ± standard deviation.